My mother hopes you ______ to my home.

The black box is a necessary device on an airplane, which records its speed, direction and whether everything on the airplane_____normally.[ ]

Usually, I don’t go to bed until midnight.— But late isn’t a good habit. It’s bad for your health.

While I_______ a detective story, someone_______ at the door．

It is in Nantong _____ you’re going to paya visit to ______ this kind of radio is made．